Super simple Ruby/Rails/Sinatra pagination

helper_method.rb

def paginate(list)
  ret = ['<div class="paginate"><div>']

  if list.paginate_page > 0
    url = Url.current
    list.paginate_page == 1 ? url.delete(list.paginate_var) : url.qs(list.paginate_var, list.paginate_page)
    ret.push %[<a href="#{url.relative}">&larr;</a>]
  else
    ret.push %[<span>&larr;</span>]
  end

  ret.push %[<i>#{list.paginate_page.or('&bull;')}</i>]

  if list.paginate_per_page == list.length
    url = Url.current
    url.qs(list.paginate_var, list.paginate_page+2)
    ret.push %[<a href="#{url.relative}">&rarr;</a>]
  else
    ret.push %[<span>&rarr;</span>]
  end

  ret.push '</div></div>'
  ret.join('')
end

model_include.rb

# include in model

module SimplePaginate
 def paginate(per_page=20, page_var=:page)
   page = Lux.params[page_var] || 1
   page = page.to_i - 1
 
   ret = where({}).limit(per_page).offset(page * per_page).all.to_a
   ret.define_singleton_method(:paginate_var) do; page_var ;end
   ret.define_singleton_method(:paginate_page) do; page ;end
   ret.define_singleton_method(:paginate_per_page) do; per_page ;end
   ret
 end
end

style.scss

.paginate {
  clear: both; 
  padding:20px 0;
  text-align:center;

  > div {
    border:1px solid #ddd; 
    display:inline-block;
    border-radius:4px;
    margin:0 auto;

    i, span, a { display:inline-block; width:40px; padding:10px; text-align:center; text-decoration:none; color:#aaa; }
    i { border-left:1px solid #eee; border-right:1px solid #eee; }
    a {
      color:#444;
      &:hover { background-color: #f7f7f7; }
    }
  }
}